The 23-year-old actress is­ ­studying English at Brown University in Providence, Rhode Island, US, where she will be sitting her finals and needs to concentrate on her academic success.

A source told the Daily Mirror newspaper: ''Emma is in demand with Hollywood directors but has so much to focus on with her studies, that she has had to pass on a few things - she simply can't do ­everything.

She and the other teenage stars were tutored on set for up to five hours a day, and despite having to balance her filming schedule with academics the blonde beauty managed to achieve eight A* and two A grades during her GCSE school examinations - which are taken by students aged 14-16 in secondary education across the United Kingdom.

Following her success as a young star she was cast in a number of other films.

Last year she starred in the film adaptation of 'The Perks of Being a Wallflower', more recently she appeared in Sofia Coppola's 'The Bling Ring' which is based on the true story of a gang of teenagers who burgled a number of homes in the Hollywood Hills.